A. Linear B. Quadratic C. Cubic D. Absolute Value E. Exponential F. Inverse G. Square Root

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1 UCS JH Algebra I REVIEW GD #2 1 Which family of function does each graph belong? A. Linear B. Quadratic C. Cubic D. Absolute Value E. Exponential F. Inverse G. Square Root 2 The coach of a basketball team gathered data on each player s height, in inches, and shoe size. He organized the data using ordered pairs in the form (Height, Shoe Size). The set of ordered pairs below shows this relation. {( ) ( ) ( ) ( ) ( )} Is this relation a function? Explain your reasoning in terms of the definition of a function.

2 3 Which of the following represents a function? Which is not a function? Explain your reasoning: A. B. 4 a. A store bought a case of disposable cameras for $300.The store s profit on the cameras is a function of the number of cameras sold. Find the range of the function when the domain is {0, 15, 50, 62}. b. In this situation, what do the domain and range represent? 5 An economist predicts the relationship between the price of music CDs (p) and the number of CDs a customer is willing to buy (n) with this function. According to this model, how many CDs is a customer willing to buy when the price is $20?

3 6 State the x- and y-intercepts for the following function. 7 State the domain and range of the following graph. 8 The table below shows the change in temperature over 12 hours. What is the rate of change per hour?

4 9 At the Hamilton Doll Company, the cost of producing each Baby Anna doll is $12 plus $8 for clothes. The doll sells for $28, so the company uses the following profit function: P(x) = 28x (12 + 8)x Where x represents the number of dolls sold. If the company decides to increase the doll s selling price to $32, what will be the increase in profit per doll? UNIT 2 10 An economist predicts the relationship between the price of music CDs (p) and the number of CDs a customer is willing to buy (n) with this function. According to this model, how many CDs is a customer willing to buy when the price is $20?

5 11 The number of cycle handlebars produced by two machines at a manufacturing plant is shown in the graph below. If both machines are operating at the same time, how many hours will it take them to produce 700 handlebars? 12 State the domain and range of. 13 You have a cell phone plane that costs $50.00 per month, and it includes 100 text messages. Use the table below to calculate the cost for each additional text message after the first 100 messages. Number of texts Total bill $50 $50 $53.75 $57.50 $65 $110

6 14 Shannon measures the height of a bamboo plant that grows at a constant rate. She records the height daily and records her measurements in the table below: On which day will the plant s height be double what its height was on Day 12? 15 The sign below shows the costs for one ice cream sundae with toppings. Number of c Topings 1 $ $ $ $4.75 Which line shown corresponds to the ordered pairs? A B C D

7 UNIT 3 16 The width of a rectangular map is 12 inches more than the length and the perimeter is 60 inches. Find the length and the width. 17 A quadrilateral has a second side 3 more than the first side. The third side is 2 less than twice the first side and the fourth side is 6 more than the first side. The perimeter is 262 meters. Find the length of all four sides. 18 Larry runs at an average a rate of 8 miles per hour. He walks at an average rate of 3 miles per hour. a. Let x = time running and y = time walking. Write an equation in standard form to relate the times he spends running and walking if he travels a distance of 15 miles. b. Graph the equation

8 19 Suppose you have a job in an ice cream shop that pays $6 per hour. You also have a babysitting job that pays $4 per hour. You want to earn at least $60 per week but would like to work no more than 12 hours per week. Write a system to model this situation. 20 A generic linear function written in standard form is shown below. Rewrite the equation solved for x. 21 Circle which step(s) contain an error based on the previous step. ( ) Step 1: Step 2: Step 3: Step 4: Step 5: What is the correct solution?

9 22 What property is used in steps 1, 2, and 4? Equation: ( ) Step 1: Step 2: Step 3: Step 4: Step 5: 23 Find the solutions for the following inequality. Graph the solution. Solution 24 Determine whether the following equations are parallel, perpendicular, or neither to the following equation. a. b. c. d. ( ) e. f. ( )

10 25 When you exercise, your pulse rate rises. Recommended pulse rates vary with age and physical condition. For vigorous exercise, such as jogging, the inequality gives a target range for pulse rate R (in beats per minute), ( ) based on age (in years). a. What is the target range for pulse rates for a person 35 years old? Round to the nearest whole number and write your answer as a compound inequality. b. Your cousin s target pulse rate is in the range between 140 and 170 beats per minute. What is your cousin s age? 26 Two systems of linear equations are shown below. { Which of these represents a step in using elimination to create an equivalent system of equations with the same solutions? A ( ) C ( ) B ( ) D ( )

11 27 How many solutions does the following system of linear equations have? 28 Solve the system of equations. 29 Name 5 ordered pairs that satisfy the equation y = x Two groups of students order burritos and tacos at a local restaurant. One order of 3 burritos and 4 tacos costs $11.33.The other order of 9 burritos and 5 tacos costs $ a. Write a system of equations that describes this situation. b. Solve by elimination to find the cost of a burrito and the cost of a taco.

12 31 Graph the inequality: 32 The Incredibles are on vacation in Virginia Beach which is 724 miles away from their home in Detroit. When they return home, they are traveling at an average speed of 60 mph. What is the x-intercept, y-intercept and what do each represent. 33 Graph the following equations. 34 Which equation has a y-intercept at 5 and is perpendicular to the line passing through the points ( ) and ( )?

13 35 Determine if the following lines are parallel, perpendicular, or neither. 36 Jennifer wrote this equation to model how she expects the price, p, of a stock will change: A As w increases, the value of p increases C As w increases, the value of p stays the same B As w increases, the value of p decreases D As w increases, the value of p increases on some days UNIT 4 37 Name the coefficients and constants for the following expressions a) b) Coefficients: Constants: Coefficients: Constants: 38 Describe each function as either a growth or decay. Explain which number represents the growth or decay, why? Explain what the other number in the function represents. a) ( ) ( ) b) ( ) ( )

14 39 The expression ( ) can be simplified as? 40 You have saved $800 from your babysitting job. You decide to invest your money in an account that has a semi-annual interest rate of 4%. Write an expression to show how much money will be in your account when you graduate from high school in 5.5 years. How much money will you have? 41 Mr. Miller owns an apple orchard. He offers his workers two possible payment plans. Option A is $1.50 per bushel of apples Option B is 1 if you pick one bushel, 3 if you pick two bushels, 9 if you pick three bushels and so on, tripling for each additional bushel you pick. If you only have enough time to pick 6 bushels, which plan should you choose? Why? If you have enough time to pick 9 bushels, which plan should you choose? Why?

15 42 In 2012 the population of Sterling Heights was 130,410. Its population is increasing by 1.6% per year. Write an equation to model the population growth of Sterling Heights since the year Simplify the following expression. 44 Since 1990, the population of Virginia has grown at an average annual rate of about 1%. In 1990, the population was about 6,284,000. a. Write an equation to model the population growth in Virginia since b. Suppose this rate of growth continues. Predict Virginia s population in 2010.

16 45 Jennifer deposits $200 into a savings account that earns 6% annual interest, compounded monthly. This is modeled by the function y = 200(1.005) 12t. Graph this function to model Jennifer s savings over 10 years. What is the y- intercept of the graph? What does the y-intercept mean in terms of Jennifer s savings account? 46 Suppose two mice live in a barn. If the number of mice doubles every month, how many mice will be in the barn after 6 months? A) Create a table of values with (x) representing the number of months and (y) representing the number of mice. B) Create an equation that represents the relationship between the month (x) and the number of mice (y).

17 47 Based on his records for his investments, Tom has determined that the equation ( ) represents the amount of money in his bank account x years after he invested $734. Describe the rate of change of Tom s account balance 48 Which equation BEST describes the graph below? A ( ) C ( ) B ( ) D ( ) ( ) 49 Two functions are defined as follows: ( ) and ( ) ( ) For which integers,, does the value of ( ) exceed the value of ( )?

18 Extra: 50 Solve for x: 4 = x + 51 Solve for x: = x + 52 You ask your parents for an allowance that is $0.01 on day 1, $0.03 on day 2, $0.09 on day 3, and so on. They counter with an allowance that is $1.00 on day 1, $4.00 on day 2, $7.00 on day 3, and so on. Whose allowance pays more on day 4? On day 9? 53 Your family is driving on I-80 through Nebraska. You will be staying in a great motel with a pool that has a slide when you arrive in Cheyenne, Wyoming. You have just left Lincoln, Nebraska which is 420 miles from the motel in Cheyenne, Wyoming. You are traveling at an average speed of 70 miles per hour. A. Write an equation that models your distance as you travel TO the hotel. B. What is the y-intercept? What does it mean in terms of the problem? C. What is the x-intercept? What does it mean in terms of the problem?